EP2442595B1 - Procédé d'émission de données, système et appareil associés - Google Patents

Procédé d'émission de données, système et appareil associés Download PDF

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Publication number
EP2442595B1
EP2442595B1 EP10785749.2A EP10785749A EP2442595B1 EP 2442595 B1 EP2442595 B1 EP 2442595B1 EP 10785749 A EP10785749 A EP 10785749A EP 2442595 B1 EP2442595 B1 EP 2442595B1
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Prior art keywords
data
mcs
channel
logical channels
logical
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German (de)
English (en)
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EP2442595A1 (fr
EP2442595A4 (fr
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Yi Zhao
Yu Ding
Xiaodong Yang
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2653—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for logical channel control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • the present invention relates to the field of communications and particularly to a data transmission method, system and device.
  • the technology of Multimedia Broadcast Multicast Service is intended to provide a user in radio cellular systems with a multimedia broadcast and multicast service.
  • the MBMS in a Long Term Evolution (LTE) system is also referred to as an evolved MBMS (eMBMS).
  • the eMBMS in an existing LTE Release 9 (LTE R9) system is performed in MBMS/Unicast-mixed cells, that is, a unicast service can also be transmitted in a cell where an MBMS is transmitted to perform coordinated transmission of the unicast service and the MBMS by transmitting the MBMS at some instances of time and the unicast service at other instances of time.
  • the MBMS is transmitted in the LTE R9 system with Multicast Broadcast Single Frequency Network (MBSFN) mode, that is, the same content of information is transmitted concurrently in multiple cells at the same frequency at the same time.
  • MBSFN Multicast Broadcast Single Frequency Network
  • a logical channel is such an interface to a high layer protocol that is defined at a Media Access Control (MAC) layer which provides the logical channel with a data transmission service.
  • the type of transmitted data service on different logical channel is distinguished by the type of the logical channel.
  • a transport channel is an interface provided at a physical layer for a high layer (e.g., the MAC layer) to transmit data, and the type of the transport channel is defined dependent upon a transmission characteristic and a transmission scheme of the data at the physical layer.
  • existing logical channels involved in transmission of an MBMS generally include a Broadcast Control Channel (BCCH), a Multicast Control Channel (MCCH) and a Multicast Traffic Channel (MTCH).
  • Transport channels generally include a Multicast Channel (MCH), a Broadcast Channel (BCH) and a Downlink Shared Channel (DL-SCH), all of which are downlink channels.
  • BCCH Broadcast Control Channel
  • MCCH Multicast Control Channel
  • MTCH Multicast Traffic Channel
  • Transport channels generally include a Multicast Channel (MCH), a Broadcast Channel (BCH) and a Downlink Shared Channel (DL-SCH), all of which are downlink channels.
  • MCH Multicast Channel
  • BCH Broadcast Channel
  • DL-SCH Downlink Shared Channel
  • logical channels and transport channels have a mapping relationship as illustrated in Fig. 1 , where the BCCH is mapped onto the BCH or the DL-SCH, and in the MBMS/Unicast-mixed cells, the MTCH and the MCCH are mapped onto the MCH.
  • These channels primarily function as follows.
  • System information is transmitted over the broadcast control channel from a network to a User Equipment (UE).
  • UE User Equipment
  • configuration information of the MCCH e.g., the repetition period of the MCCH, an offset of a starting sub-frame of the MCCH, an amount of sub-frames occupied by the MCCH, and a configuration of Radio Link Control Unacknowledged Mode (RLC UM)
  • RLC UM Radio Link Control Unacknowledged Mode
  • the multicast control channel is a point-to-multipoint downlink channel over which MBMS-related control information is transmitted to the UE from the network, and one MCCH may correspond to one or more MTCHs, that is, control information of a plurality of MTCHs may be carried over the MCCH.
  • Information carried over the MCCH includes configuration information of an MBMS logical channel (e.g., the MTCH, and an MSCH), information of an MBMS Radio Bearer (RB) (e.g., the RB index information of RBs provided in a modification period of the MCCH), information of an MBMS Session Start, and information of an MBMS Session Stop.
  • MBMS logical channel e.g., the MTCH, and an MSCH
  • RB MBMS Radio Bearer
  • the multicast traffic channel is a point-to-multipoint downlink channel over which specific MBMS traffic data is transmitted to the UE from the network.
  • the MTCH and the MCCH may be mapped onto the same MCH, that is, the MTCH and the MCCH are multiplexed at the MAC layer.
  • the MTCH and the MCCH may be multiplexed at the MAC layer through Time Division Multiplexing (TDM), or TDM-based internal multiplexing in a Transport Block (TB).
  • TDM Time Division Multiplexing
  • TB Transport Block
  • transmission of data over a transport channel through TDM refers to time-division transmission of data of logical channels multiplexed over the same transport channel, that is, data of only one of the logical channels multiplexed over the transport channel can be transmitted in one sub-frame allocated to the transport channel.
  • data information over the MTCH and the MCCH is transmitted respectively over different sub-frames corresponding to the MCH, as illustrated in Fig. 2 .
  • transmission of data over a transport channel through TDM-based internal multiplexing in a TB means that firstly data of a specific logical channel (or a set of logical channels), e.g., data of the MCCH, or a combination of data of the MCCH and another logical channel (e.g., the MBMS Scheduling Channel (MSCH) over which scheduling information of an MBMS is transmitted), is transmitted through TDM, and when all of the data over the specific logical channel or the set of logical channels in a specific sub-frame has been transmitted but the resource available from the TB of the sub-frame has not been exhausted, data of another logical channel (or a set of logical channels) is allowed to be transmitted in the same TB.
  • a specific logical channel e.g., data of the MCCH, or a combination of data of the MCCH and another logical channel (e.g., the MBMS Scheduling Channel (MSCH) over which scheduling information of an MBMS is transmitted
  • one sub-frame corresponds to one TB for each transport channel, and only one Modulation and Coding Scheme (MCS) is adopted for the TB.
  • MCS Modulation and Coding Scheme
  • Data of only one MCH transport channel may be present in an MBSFN sub-frame occupied for MBMS transmission. Since MBMS-related control information is carried over the MCCH, a different modulation and coding scheme from that for transmission of data of another logical channel (e.g., the MTCH) is typically adopted to improve the reliability of reception at the UE so that the UE can receive the MBMS-related control information reliably.
  • another logical channel e.g., the MTCH
  • some rules should be defined in order to have a fixed MCS or to inform the UE in advance (e.g., the MCS for MCCH could be standardized and used for MCCH/MTCH multiplexed TB or another option could rely on using system information to configure the MCS for MCCH and for MCCH and MTCH multiplexing TB in advanced).
  • Embodiments of the invention provide a data transmission method, system and device as recited in the accompanying claims to satisfy transmission quality requirements of data of a plurality of types of MBMS-related logical channels mapped onto the same transport channel.
  • a plurality of Modulation and Coding Schemes (MCSs) required for the same transport channel onto which a plurality of types of logical channels are mapped, are determined at the network side, and a user equipment is notified of a corresponding relationship between the logical channels and the MCSs; and data of the logical channels mapped onto the transport channel is modulated and encoded at the network side according to the MCSs required for the transport channel and then transmitted to the user equipment over the transport channel, so that the MCSs can be adopted over the transport channel, onto which the plurality of types of MBMS-related logical channels are mapped, to thereby satisfy transmission quality requirements of data of the plurality of types of logical channel.
  • MCSs Modulation and Coding Schemes
  • Fig. 1 is a schematic diagram of a mapping relationship between logical channels and transport channels
  • Fig. 2 is a schematic diagram of multiplexing MCCH data and MTCH data through TDM;
  • Fig. 3 is a schematic diagram of multiplexing MCCH data and MTCH data through TDM-based transport block multiplexing
  • Fig. 4 is a schematic diagram of a general flow of a data transmission method according to an embodiment of the invention.
  • Fig. 5 is a schematic diagram of a transmission scheme of MCCH data according to an embodiment of the invention.
  • Fig. 6 is a schematic structural diagram of a data transmission device according to an embodiment of the invention.
  • Fig. 7 is a schematic structural diagram of an MCS notification unit according to an embodiment of the invention.
  • Fig. 8 is a schematic structural diagram of another MCS notification unit according to an embodiment of the invention.
  • Fig. 9 is a schematic structural diagram of a transmission processing unit according to an embodiment of the invention.
  • Fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the invention.
  • Embodiments of the invention provide a data transmission method, system and device to satisfy transmission quality requirements of data over a plurality of types of MBMS-related logical channels mapped onto the same transport channel.
  • a data transmission method includes the following steps.
  • MCSs Modulation and Coding Schemes
  • Data of the logical channels mapped onto the transport channel is modulated and encoded at the network side according to the required MCSs and then transmitted to the user equipment over the transport channel.
  • the corresponding relationship between the logical channels and the MCSs may be represented as a corresponding relationship between the logical channels and indexes of the MCSs.
  • a type of logical channel corresponds to only one MCS at a transmission instance of time, and each type of logical channel may or may not correspond to the same MCS.
  • the user equipment may be notified of the corresponding relationship in the step S101 in the following two ways:
  • the method further includes: before the data of the plurality of types of logical channels is transmitted at the network side to the user equipment over the same transport channel, the user equipment is notified at the network side of an amount of sub-frames and/or serial numbers of the sub-frames occupied respectively for the plurality of types of logical channels mapped onto the same transport channel.
  • the data of the logical channels mapped onto the same transport channel may be modulated and encoded at the network side according to the MCSs required for the transport channel in the step S 102 in the following two ways:
  • MBMS control information is transmitted over an MCCH while ensuring reliable reception of the MBMS control information at a UE; and specific MBMS traffic information is transmitted over an MTCH while ensuring the spectrum efficiency to some extent.
  • MCSs of a transport channel are configured so that the reliability of reception of the MCCH can be improved while ensuring the spectrum efficiency of transmitting the MTCH when the MCCH and the MTCH are mapped onto the same transport channel MCH.
  • a specific design of modulation and coding schemes of the transport channel MCH is as follows:
  • the UE may know of which MCS is adopted for which type of logical channel in numerous ways.
  • MCSs adopted for the same MCH are transmitted and a corresponding relationship between the MCCH and an index of an MCS is transmitted to a user equipment over a BCCH; and a corresponding relationship between the MTCH and an index of an MCS is transmitted to the user equipment over the MCCH.
  • the user equipment may determine, from the corresponding relationship between the MCCH and the index of the MCS, the MCS adopted for the MCCH data transmitted over the MCH and determine, from the corresponding relationship between the MTCH and the index of the MCS, the MCS adopted for the MTCH data transmitted over the MCH.
  • the MCSs adopted for the same MCH are transmitted over the BCCH by configuring subsets including such parameters as a TDM Period, an Offset, a Transmission Length, and an MCS, for example:
  • the MCS included in the subset may also be replaced with the index of the MCS, that is, a corresponding relationship between the indexes of the MCSs and the different logical channels may be transmitted directly at the network side instead of the specific MCSs after negotiation about the MCSs required for the logical channels is performed in advance between the network side and the user equipment.
  • the data of the MCCH and the MTCH may be mapped according to the different subsets at the network side, for example, the data of the MCCH is transmitted according to the parameters in the Subset 1, and the data of the MTCH is transmitted according to the parameters in the Subset 2.
  • the TDM Period refers to a period at which a logical channel (or a set of logical channels constituted of a plurality of types of logical channels) appears over the MCH.
  • each type of logical channel corresponds to only one MCS and each MCS may correspond to one type of logical channel or to a set of logical channels constituted of a plurality of types of logical channels, i.e., to a plurality of types of logical channels.
  • a scheduling-based period that is, a period at which a logical channel appears is set based upon a scheduling period
  • the TDM Period may mean differently according to different types of logical channels, for example, for the MCCH, the TDM Period may be a repetition period or a modification period of the MCCH; for the MTCH, the TDM Period may be a scheduling period of the MTCH; and for the MSCH, the TDM Period may be a repetition period or a modification period of the MSCH.
  • the data of the MCCH is transmitted as illustrated in Fig. 5 , where each small square represents the data of the MCCH transmitted in a modification period of the MCCH and/or a repetition period of the MCCH.
  • the data of the MCCH is unchanged in the modification period of the MCCH, and if there is a repetition period of the MCCH, the data of the MCCH is retransmitted in the repetition period of the MCCH, and the UE may receive a plurality of pieces of the same information in the modification period of the MCCH and can acquire the current MCCH data as long as it receives correctly the data once.
  • the data of the MCCH may or may not be different between different modification cycles of the MCCH, that is, the data of the MCCH may or may not be modified at the network side upon arrival of each modification period of the MCCH.
  • the Transmission Length refers to an amount of sub-frames occupied for data of a logical channel (or a set of logical channels) transmitted in each TDM period of the logical channel (or the set of logical channels).
  • the MCS refers to an MCS adopted in a sub-frame in which data of a logical channel (or a set of logical channels) is transmitted over the transport channel.
  • the MCCH corresponds to the Subset 1, and the user equipment may know from the parameter of Offset 1 the starting instance of time at which the MCCH data is received; the user equipment may know from the parameter of Transmission Length 1 the amount of sub-frames occupied for the MCCH data upon each reception of the MCCH data; the user equipment may know from the parameter of MCS 1 which MCS is adopted to receive the MCCH data; and the user equipment may know from the TDM Period an interval at which the MCCH data is received.
  • the user equipment can receive correctly the data of the logical channel according to the parameters carried in the subset corresponding to the logical channel.
  • the parameters of the respective subsets are transmitted over the BCCH, and only a corresponding relationship between logical channels (or sets of logical channels), such as the MTCH, and indexes of the subsets is carried over the MCCH.
  • the corresponding relationship between the logical channels and the subsets may be transmitted over the BCCH.
  • the corresponding relationship between the MCCH and the MCS may be transmitted to the user equipment over the BCCH, and the corresponding relationship between the MTCH and the MCS may be transmitted to the user equipment over the MCCH.
  • the corresponding relationship between the MCCH and the index of the MCS may be transmitted to the user equipment over the BCCH, and the corresponding relationship between the MTCH and the index of the MCS may be transmitted to the user equipment over the MCCH.
  • the index of the MCS as described in the embodiment of the invention may be an identifier of the MCS.
  • the user equipment knows from the BCCH the MCS adopted for the sub-frame carrying the MCCH data and knows from the MCCH the MCS adopted for the sub-frame carrying the MTCH data.
  • an MCS may be carried in a subset as in the first approach, and the corresponding relationship between the MCCH and the subset is transmitted over the BCCH and the corresponding relationship between the MTCH and the subset is transmitted over the MCCH.
  • the operations at the network side may be performed by a base station or another network node.
  • a data reception method includes the following steps.
  • a user equipment acquires a corresponding relationship between logical channels and MCSs (or indexes of the MCSs), which is notified from the network side.
  • the user equipment determines, from the corresponding relationship, an MCS adopted for data of a logical channel among data of a plurality of types of logical channels transmitted over the same transport channel from the network side.
  • the user equipment demodulates and decodes the data of the corresponding logical channel according to the MCS determined in the second step.
  • the user equipment acquires, from the Broadcast Control Channel (BCCH), the MCSs corresponding to the logical channels among the types of logical channels mapped onto the same transport channel, which is notified from the network side, where the logical channels may or may not correspond to the same MCS.
  • BCCH Broadcast Control Channel
  • the user equipment may acquire the corresponding relationship between the logical channels among the types of logical channels mapped onto the same transport channel and the MCSs, which is notified from the network side, as follows:
  • the method may further includes: the user equipment acquires the amount of sub-frames and/or the serial numbers of sub-frames occupied respectively for the plurality of types of logical channels, which are transmitted from the network side.
  • the user equipment may demodulate and decode the data of each type of logical channel according to the corresponding MCS.
  • TDM Time Division Multiplexing
  • the user equipment may demodulate and decode the data of more than one types of logical channels to be transmitted in the same sub-frame according to the MCS with the highest reliability among the MCSs corresponding to the more than one types of logical channels, and demodulate and decode the data of one type of logical channel to be transmitted in a separate sub-frame according to the MCS corresponding to the logical channel.
  • the MCCH data and the MTCH data are multiplexed through TDM.
  • the MCH onto which the MCCH and the MTCH are mapped together includes six sub-frames in total and the MCCH and the MTCH are multiplexed through TDM, that is, a sub-frame in which the MCCH data is transmitted is different from a sub-frame in which the MTCH data is transmitted.
  • MBMS control information shall firstly be transmitted by occupying 3 sub-frames, so the base station modulates and encodes the first three sub-frames over the MCH occupied for transmission of the MCCH data according to the MCS 1 with the high reliability and modulates and encodes the sub-frames occupied for subsequent transmission of the MTCH data according to the MCS 2 with a high spectrum efficiency.
  • the user equipment receives the MCCH data according to the MCS 1 notified from the base station and the amount of sub-frames and/or the serial numbers of sub/frames occupied for the MCCH data, which are appointed in advance (or notified in a broadcast message), and receives sub-frames occupied for the MTCH data according to the MCS 2 notified from the base station.
  • the MCCH data and the MTCH data are multiplexed through TDM-based transport block multiplexing.
  • the MCH onto which the MCCH and the MTCH are mapped together includes six sub-frames in total and the data of the MCCH and the MTCH are multiplexed through TDM-based transport block multiplexing.
  • MBMS control information shall firstly be transmitted by occupying 3 sub-frames, so the base station modulates and encodes sub-frames, in which the MCCH data is transmitted, according to the MCS 1 with the high reliability (although some of the sub-frames may include the data of the MTCH) and modulates and encodes sub-frames in which no MCCH data is included according to the MCS2 with a high spectrum efficiency.
  • the user equipment receives the MCCH data according to the MCS1 notified from the base station and the amount of sub-frames and/or the serial numbers of sub-frames occupied for the MCCH data, which are appointed in advance (or notified in a broadcast message), and receives the sub-frames occupied for the MTCH data according to the MCS 2 notified from the base station.
  • an MCCH and an MTCH are mapped onto the same MCH
  • the method according to the embodiment of the invention may also be applied to another scenario, for example, in which an MCCH, an MTCH, an MSCH or a Media Access Control Control Element (MAC CE) for scheduling and other logical channel(s) are multiplexed onto the same MCH.
  • These logical channels may be multiplexed as illustrated in Fig. 2 or Fig. 3 .
  • Different MCSs may be set for the different logical channels, and the UE may be notified of the different MCSs corresponding to the different logical channels over a BCCH and/or an MCCH.
  • the logical channels may alternatively be grouped, and the same MCS may be adopted for the same set of logical channels, for example, data of the Multicast Scheduling Channel (MSCH) and data of the MAC CE may be modulated and encoded according to the same dedicated MCS, or multiplexed with data of the MCCH and/or the MTCH in the same sub-frame and modulated and encoded according to the same MCS as the MCS corresponding to the MCCH and/or the MTCH.
  • MSCH Multicast Scheduling Channel
  • a data transmission device includes:
  • the MCS notification unit 11 includes:
  • the MCS notification unit 11 includes:
  • the device preferably further includes:
  • the transmission processing unit 12 preferably includes:
  • a data reception device e.g., a user equipment, may include:
  • the MCS determination unit may determine only the MCSs corresponding to those logical channels to be received.
  • the corresponding relationship acquisition unit 21 is configured to acquire over a Broadcast Control Channel (BCCH) the corresponding relationship between the logical channel among the plurality of types of logical channels mapped onto the same transport channel and the MCS, which is notified from the network side.
  • BCCH Broadcast Control Channel
  • the corresponding relationship acquisition unit 21 is configured to acquire a corresponding relationship between a specific logical channel determined at the network side and an MCS or an index of the MCS over a Broadcast Control Channel (BCCH) and acquire a corresponding relationship between the other logical channels mapped onto the same transport channel than the specific logical channel and MCSs or indexes of the MCSs over the specific logical channel.
  • BCCH Broadcast Control Channel
  • the device may further include a first acquisition unit configured to acquire an amount of sub-frames and/or serial numbers of sub-frames occupied respectively for the plurality of types of logical channels, which are transmitted from the network side, before the user equipment demodulates and decodes the data of the logical channel.
  • a first acquisition unit configured to acquire an amount of sub-frames and/or serial numbers of sub-frames occupied respectively for the plurality of types of logical channels, which are transmitted from the network side, before the user equipment demodulates and decodes the data of the logical channel.
  • the processing unit 23 is configured to demodulate and decode the data of the logical channel according to the corresponding MCS.
  • the processing unit 23 is configured to demodulate and decode the data of more than one types of logical channels to be transmitted in the same sub-frame according to the MCS with the highest reliability among the MCSs corresponding to the more than one types of logical channels, and demodulate and decode the data of one type of logical channel to be transmitted in a separate sub-frame according to the MCS corresponding to the logical channel.
  • a communication system includes a base station and at least one user equipment.
  • the base station is configured to determine a plurality of Modulation and Coding Schemes (MCSs) required for the same transport channel, onto which a plurality of types of logical channels are mapped, and notify the user equipment of a corresponding relationship between the logical channels and the MCSs; and modulate and encode data of the logical channels mapped onto the transport channel according to the MCSs required for the transport channel and then transmit the data to the user equipment over the transport channel.
  • MCSs Modulation and Coding Schemes
  • the user equipment is configured to acquire the corresponding relationship between the logical channels and the MCSs, which is transmitted from the base station, determine from the corresponding relationship an MCS adopted for data of a logical channel and demodulate and decode the data of the logical channel according to the determined MCS.
  • the base station and the user equipment may interact dependent upon the foregoing implementations of the network side and the user equipment, and a repeated description thereof will not be repeated here.
  • a plurality of Modulation and Coding Schemes (MCSs) required for the same transport channel, onto which a plurality of types of logical channels are mapped, are determined at the network side, and a user equipment is notified of a corresponding relationship between the logical channels and the MCSs or the indexes of the MCSs; and data of the logical channels mapped onto the transport channel is modulated and encoded at the network side according to the MCSs required for the transport channel and then transmitted to the user equipment over the transport channel, so that the MCSs may be adopted over the transport channel, onto which the plurality of types of MBMS-related logical channels are mapped, to thereby satisfy transmission quality requirements of data of the plurality of types of logical channels.
  • MCSs Modulation and Coding Schemes

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Claims (13)

  1. Procédé de transmission de données, consistant à :
    déterminer, à partir du côté de réseau, une pluralité de schémas de modulation et codage, MCS, requis pour le même canal de transport sur lequel une pluralité de types de canaux logiques connexes à un service MBMS sont mis en correspondance, et signaler, à un équipement d'utilisateur, une relation correspondante entre les canaux logiques et les schémas MCS (S101) ; et
    moduler et coder, à partir du côté de réseau, des données des canaux logiques mis en correspondance sur le canal de transport selon les schémas MCS requis, et transmettre les données à l'équipement d'utilisateur sur le canal de transport (S102) ;
    caractérisé en ce que l'étape consistant à signaler, à l'équipement d'utilisateur, la relation correspondante entre les canaux logiques et les schémas MCS, consiste à :
    déterminer, à partir du côté de réseau, un ou plusieurs types de canaux logiques spécifiques parmi la pluralité de types de canaux logiques mis en correspondance sur le même canal de transport ;
    transmettre, à partir du côté de réseau, une relation correspondante entre le ou les canaux logiques spécifiques et un ou des schémas MCS ou un ou des indices du ou des schémas MCS, à l'équipement d'utilisateur, sur un canal de commande de diffusion, BCCH ; et
    transmettre, à partir du côté de réseau, une relation correspondante entre les autres canaux logiques mis en correspondance sur le même canal de transport que le ou les canaux logiques spécifiques et les schémas MCS, à l'équipement d'utilisateur, sur le ou les canaux logiques spécifiques.
  2. Procédé selon la revendication 1, consistant en outre à : avant de transmettre, à partir du côté de réseau, les données de la pluralité de types de canaux logiques, à l'équipement d'utilisateur, sur le canal de transport :
    signaler, à partir du côté de réseau, à l'équipement d'utilisateur, une quantité de sous-trames et/ou des numéros de série de sous-trames qui sont respectivement occupées pour la pluralité de types de canaux logiques.
  3. Procédé selon la revendication 1 ou 2, dans lequel l'étape consistant à moduler et coder, à partir du côté de réseau, les données des canaux logiques mis en correspondance sur le canal de transport selon les schémas MCS requis, consiste à :
    lorsque les données de la pluralité de types de canaux logiques sont transmises par le biais d'un multiplexage par répartition dans le temps, TDM, moduler et coder, à partir du côté de réseau, des données de chaque type de canal logique selon un schéma MCS correspondant ; ou
    lorsque les données de la pluralité de types de canaux logiques sont transmises par le biais d'un multiplexage de blocs de transport basé sur le multiplexage TDM, moduler et coder, à partir du côté de réseau, des données de plus d'un type de canaux logiques à transmettre dans la même sous-trame, selon un schéma MCS offrant la fiabilité la plus élevée parmi les schémas MCS correspondant audit plus d'un type de canaux logiques, et moduler et coder des données d'un type de canal logique à transmettre dans une sous-trame individuelle, selon un schéma MCS correspondant au canal logique.
  4. Procédé selon la revendication 1 ou 2, dans lequel la relation correspondante entre les canaux logiques et les schémas MCS est représentée sous la forme d'une relation correspondante entre les canaux logiques et des indices des schémas MCS.
  5. Procédé de réception de données, consistant à :
    acquérir, par le biais d'un équipement d'utilisateur, une relation correspondante entre un canal logique parmi une pluralité de types de canaux logiques connexes à un service MBMS mis en correspondance sur le même canal de transport et un schéma MCS, laquelle relation est signalée à partir du côté de réseau ;
    déterminer, par le biais de l'équipement d'utilisateur, à partir de la relation correspondante entre le canal logique et le schéma MCS, le schéma MCS correspondant au canal logique mis en correspondance à partir du côté de réseau sur le canal de transport ; et
    démoduler et décoder, par le biais de l'équipement d'utilisateur, des données du canal logique selon le schéma MCS déterminé ;
    caractérisé en ce que l'étape d'acquisition, par le biais de l'équipement d'utilisateur, de la relation correspondante entre le canal logique parmi la pluralité de types de canaux logiques connexes à un service MBMS mis en correspondance sur le même canal de transport et le schéma MCS, laquelle est signalée à partir du côté de réseau, consiste à :
    acquérir, par le biais de l'équipement d'utilisateur, une relation correspondante entre un canal logique spécifique déterminé à partir du côté de réseau et un schéma MCS sur un canal de commande de diffusion, BCCH ; et
    acquérir, par le biais de l'équipement d'utilisateur, une relation correspondante entre les autres canaux logiques mis en correspondance sur le même canal de transport que le canal logique spécifique et les schémas MCS sur le canal logique spécifique.
  6. Procédé selon la revendication 5, consistant en outre à : avant que l'équipement d'utilisateur ne démodule et ne décode les données du canal logique :
    acquérir, par le biais de l'équipement d'utilisateur, une quantité de sous-trames et/ou des numéros de série de sous-trames qui sont respectivement occupées pour la pluralité de types de canaux logiques, lesquelles sont transmises à partir du côté de réseau.
  7. Procédé selon la revendication 5 ou 6, dans lequel lorsque des données de la pluralité de types de canaux logiques sont transmises, à partir du côté de réseau, à travers un multiplexage par répartition dans le temps, TDM, l'étape de démodulation et décodage des données du canal logique consiste à :
    démoduler et décoder, par le biais de l'équipement d'utilisateur, des données de chaque type de canal logique selon un schéma MCS correspondant au canal logique ; et
    dans lequel, lorsque des données de la pluralité de types de canaux logiques sont transmises par le biais d'un multiplexage de blocs de transport basé sur le multiplexage TDM, l'étape de démodulation et décodage des données du canal logique consiste à :
    démoduler et décoder, par le biais de l'équipement d'utilisateur, des données de plus d'un type de canaux logiques à transmettre dans la même sous-trame, selon un schéma MCS offrant la fiabilité la plus élevée parmi les schémas MCS correspondant audit plus d'un type de canaux logiques, et démoduler et décoder des données d'un type de canal logique à transmettre dans une sous-trame individuelle, selon un schéma MCS correspondant audit un type de canal logique.
  8. Dispositif de transmission de données, comportant :
    une unité de notification de schéma MCS (11) configurée de manière à déterminer une pluralité de schémas de modulation et codage, MCS, requis pour le même canal de transport, sur lequel une pluralité de types de canaux logiques connexes à un service MBMS sont mis en correspondance, et à signaler, à un équipement d'utilisateur, une relation correspondante entre les canaux logiques et les schémas MCS ; et
    une unité de traitement de transmission (12) configurée de manière à moduler et coder des données des canaux logiques mis en correspondance sur le canal de transport selon les schémas MCS requis, et à transmettre les données à l'équipement d'utilisateur sur le canal de transport ;
    caractérisé en ce que l'unité de notification de schéma MCS (11) comporte :
    une unité de détermination de schéma MCS (113) configurée de manière à déterminer les schémas MCS requis pour le même canal de transport sur lequel la pluralité de types de canaux logiques est mise en correspondance ;
    une unité de détermination de canal logique spécifique (114) configurée de manière à déterminer un ou plusieurs types de canaux logiques spécifiques parmi la pluralité de types de canaux logiques mis en correspondance sur le même canal de transport ;
    une unité de transmission de canal BCCH (115) configurée de manière à transmettre une relation correspondante entre le ou les canaux logiques spécifiques et un ou des schémas MCS ou un ou des indices du ou des schémas MCS, à l'équipement d'utilisateur, sur un canal de commande de diffusion, BCCH ; et
    une unité de transmission de canal logique spécifique (116) configurée de manière à transmettre une relation correspondante entre les autres canaux logiques mis en correspondance sur le même canal de transport que le ou les canaux logiques spécifiques et les schémas MCS ou les indices des schémas MCS, à l'équipement d'utilisateur, sur le ou les canaux logiques spécifiques.
  9. Dispositif selon la revendication 8, comportant en outre :
    une unité de notification d'informations de sous-trame (13) configurée de manière à signaler, à l'équipement d'utilisateur, une quantité de sous-trames et/ou des numéros de série de sous-trames qui sont respectivement occupées pour la pluralité de types de canaux logiques.
  10. Dispositif selon la revendication 8 ou 9, dans lequel l'unité de traitement de transmission (12) comporte :
    une unité de modulation et codage (121) configurée de manière à moduler et coder des données de chaque type de canal logique, selon un schéma MCS correspondant au canal logique, lorsque des données de la pluralité de types de canaux logiques sont transmises par le biais d'un multiplexage par répartition dans le temps, TDM ; ou à moduler et coder des données de plus d'un type de canaux logiques à transmettre dans la même sous-trame, selon un schéma MCS offrant la fiabilité la plus élevée parmi les schémas MCS correspondant audit plus d'un type de canaux logiques, et à moduler et coder des données d'un type de canal logique à transmettre dans une sous-trame individuelle, selon un schéma MCS correspondant au canal logique, lorsque des données de la pluralité de types de canaux logiques sont transmises par le biais d'un multiplexage de blocs de transport basé sur le multiplexage TDM ; et
    une unité de transmission (122) configurée de manière à transmettre les données traitées par l'unité de modulation et codage (121), à l'équipement d'utilisateur, sur le canal de transport.
  11. Dispositif de réception de données, comportant :
    une unité d'acquisition de relation correspondante (21) configurée de manière à acquérir une relation correspondante entre un canal logique parmi une pluralité de types de canaux logiques connexes à un service MBMS mis en correspondance sur le même canal de transport et un schéma de modulation et codage, MCS, laquelle relation est signalée à partir du côté de réseau ;
    une unité de détermination de schéma MCS (22) configurée de manière à déterminer, à partir de la relation correspondante entre le canal logique et le schéma MCS, le schéma MCS adopté pour des données du canal logique, transmises sur le même canal de transport, à partir du côté de réseau ; et
    une unité de traitement (23) configurée de manière à démoduler et décoder les données du canal logique selon le schéma MCS déterminé par l'unité de détermination de schéma MCS (22) ;
    caractérisé en ce que l'unité d'acquisition de relation correspondante (21) est configurée de manière à acquérir une relation correspondante entre un canal logique spécifique déterminé à partir du côté de réseau et un schéma MACS ou un indice du schéma MCS sur un canal de commande de diffusion, BCCH, et à acquérir une relation correspondante entre les autres canaux logiques mis en correspondance sur le même canal de transport que le canal logique spécifique et les schémas MCS ou les indices des schémas MCS sur le canal logique spécifique.
  12. Dispositif selon la revendication 11, comportant en outre une première unité d'acquisition configurée de manière à acquérir une quantité de sous-trames et/ou des numéros de série de sous-trames qui sont respectivement occupées pour la pluralité de types de canaux logiques, lesquelles sont transmises à partir du côté de réseau, avant que l'équipement d'utilisateur ne démodule et ne décode les données du canal logique.
  13. Dispositif selon la revendication 11 ou 12 dans lequel l'unité de traitement (23) est configurée de manière à démoduler et décoder des données de chaque type de canal logique selon un schéma MCS correspondant ; ou
    dans lequel l'unité de traitement (23) est configurée de manière à démoduler et décoder des données de plus d'un type de canaux logiques à transmettre dans la même sous-trame, selon un schéma MCS offrant la fiabilité la plus élevée parmi les schémas MCS correspondant audit plus d'un type de canaux logiques, et à démoduler et décoder des données d'un type de canal logique à transmettre dans une sous-trame individuelle, selon un schéma MCS correspondant au canal logique.
EP10785749.2A 2009-06-09 2010-06-09 Procédé d'émission de données, système et appareil associés Active EP2442595B1 (fr)

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EP2442595A1 (fr) 2012-04-18
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KR101407595B1 (ko) 2014-06-13
US8588195B2 (en) 2013-11-19
MX2011013278A (es) 2012-01-12
CN101924998B (zh) 2011-12-21
WO2010142236A1 (fr) 2010-12-16
KR20120025593A (ko) 2012-03-15
JP5356595B2 (ja) 2013-12-04
CN101924998A (zh) 2010-12-22

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